﻿using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WindowsFormsApp2
{
   public class Dbhelper
    {

       public static readonly string conString = "server=.;database=dbx;uid=sa;pwd=lwl20000412";
        public static DataTable GetDataTable(string sql)
        {

            //string sqlString = "select * from student";

            SqlConnection connection = new SqlConnection(conString);

            SqlDataAdapter adapter = new SqlDataAdapter(sql, connection);

            connection.Open();

            DataTable dt = new DataTable();

            adapter.Fill(dt);

            return dt;








        }

       public static int AddorUpdate(string sql)
        {
           SqlConnection connection = new SqlConnection(conString);

            SqlCommand command = new SqlCommand(sql,connection);
        
            connection.Open();

            return command.ExecuteNonQuery();
        }







    }
}
